67878943 has 12 divisors (see below), whose sum is σ = 79002000. Its totient is φ = 58076480.

The previous prime is 67878869. The next prime is 67878947. The reversal of 67878943 is 34987876.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-67878943 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67878947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14443 + ... + 18556.

It is an arithmetic number, because the mean of its divisors is an integer number (6583500).

Almost surely, 2^67878943 is an apocalyptic number.

67878943 is a deficient number, since it is larger than the sum of its proper divisors (11123057).

67878943 is a wasteful number, since it uses less digits than its factorization.

67878943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33038 (or 33027 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 67878943 is about 8238.8678227048. The cubic root of 67878943 is about 407.9231541001.

The spelling of 67878943 in words is "sixty-seven million, eight hundred seventy-eight thousand, nine hundred forty-three".